If you're referring to when you go to altissia for the first time, no not really. Without spoiling anything, soon after getting to altissia (chapter 9) you have the ability to return to lucis as many times as you want, which does include all chapters after 9 barring a few parts later on

All of my games go one of two ways, our team gets incredibly fed or they do. Most of my games are over by 15 min and one of the teams is just hoping for the game to end sooner. How the fuck am I not supposed to tilt from this?

Maybe I misunderstand something. What REALLY is the role of the adc? Admittedly I loved blaming my play on the "adcs are weak" meta, but from what much better players are saying, it's quite the opposite. They're saying adcs are pretty much balanced as best they can. The thing is, just how the hell is it "balanced" if adcs are consistently out damaged by tanks and bruisers? How can I possibly succeed as a Adc..
I'm just frustrated

Dude, great plan. Really, do that and do it every day until you're satisfied. A few months before my 21st, I failed out of college, got fired from job, and my gf at the time broke up with me. A month later I have a job but I still haven't got myself the therapy I need nor the healthy lifestyle I've wanted. Do not go down my path. I can't tell you how many times I've cried myself to sleep